JP3320082B2 - Refrigerator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a refrigerator.

[0002]

2. Description of the Related Art In a conventional refrigerator, a timer is simultaneously energized when a compressor operates, and the timer performs a defrosting operation when the operation time of the compressor is accumulated and reaches a predetermined time. Yes (actual opening 58-1923
No. 77).

Another conventional refrigerator shown in FIG. 27 is proposed (Japanese Utility Model Laid-Open No. 1-106875). In the figure, 101 is a compressor, 102 is a fan,
Reference numeral 105 denotes a freezing room, 103 denotes a temperature sensor (hereinafter, a freezing room thermistor) for detecting the temperature inside the refrigerator 105, 129 denotes a power supply circuit, 109 denotes a control board, and 131 denotes a drive circuit. Control the freezing room thermistor 103 on the control board 1
09, the control circuit 109 controls the drive circuit 131 to operate and stop the compressor 101. At the same time, the fan 102 is also synchronized with the compressor 101.

[0004]

Since the conventional refrigerator is controlled as described above, the defrosting operation starts when the compressor operates for a certain period of time irrespective of the use state of the refrigerator. There is also a problem that the frost may be defrosted even when the food is frequently used, which affects the temperature of the stored food.

In the conventional refrigerator control, the number of rotations of the fan is constant irrespective of the use state of the refrigerator, and the number of rotations is always the same even when the frequency of use is relatively low. However, there is a problem in that the power is provided more than necessary and power consumption is affected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has an effect on the food temperature of food stored in a refrigerator while responding to the change according to the use condition of the refrigerator. It is an object of the present invention to obtain a control device for a refrigerator capable of performing defrosting without giving frost.

Another object of the present invention is to provide a low-noise, low-noise refrigerator control device capable of controlling the number of revolutions of a fan while responding to the change in accordance with the usage state of the refrigerator.

[0008]

Means for Solving the Problems Claim 1 according to the present invention.
The refrigerator control device forcibly circulates a cool air generated by a cooler of a refrigeration cycle using a compressor with a fan, and in a refrigerator having a door, a compressor operation time for integrating the operation time of the compressor. Accumulating means, means for accumulating and updating the operating time of the compressor over at least the past seven days or more, and calculating a compressor operating rate for each predetermined unit time in one day; Means for calculating the door opening and closing frequency from the integrated number of door openings,
Within the time range to perform the defrosting operation of the defrosting operation of the cooler predetermined from the compressor operation rate and the door opening and closing frequency,
Select the smallest time unit of the door opening and closing times, and the smallest time unit of the door opening and closing times, if the maximum is within the time range to the door opening and closing times of the next unit time performing up the frost,
A unit time selecting means for selecting a unit time based on a control rule for selecting a time unit having the smallest number of door opening / closing times next to a time unit having the smallest number of door opening / closing times; and a defrosting operation for the selected unit time. And means for executing.

According to a second aspect of the present invention, in the refrigerator having the door, the cool air generated by the cooler of the refrigeration cycle using the compressor is forcibly circulated by a fan. Means for accumulating the operating time of the compressor, means for calculating a compressor operating rate for each predetermined unit time from the operating time of the compressor, and when the compressor operating time reaches a predetermined value, the compressor operation Means for estimating a time range in which defrosting should be performed from the rate, means for integrating the number of opening of the door, means for calculating a door opening / closing frequency per unit time from the integrated number of opening of the door, and estimated time. The unit includes a unit for selecting a unit time to enter a defrosting operation based on a door opening / closing frequency from unit times included in the range, and a unit for executing the defrosting operation at the selected unit time.

[0010]

According to the refrigerator control device of the present invention, the operation rate of the compressor is calculated in units of 7 days or more (8 days), so that fluctuations for each day of the week can be absorbed, and , within a time range to perform defrosting from the switching frequency of the operation ratio and the door of the compressor, and a door opening and closing of the smallest time unit number, the time range to the door opening and closing times of the next unit time performing up the frost Is the largest, the smallest number of times the door is opened and closed
Since the defrosting operation of the cooler is performed based on a control rule that selects a time period in which the number of times of opening and closing the door is the second to the next time unit, the temperature of food in the refrigerator is not affected.

According to a second aspect of the present invention, there is provided a refrigerator control device for estimating a time range in which defrosting is to be performed based on a predetermined control rule based on a compressor operation rate, and operating the compressor and determining whether a door is opened or closed. Since the defrosting operation of the cooler is performed based on the control rule based on the frequency, the temperature of the food in the refrigerator is not affected.

[0012]

[Embodiment 1] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of Embodiment 1 of a refrigerator according to the present invention. 1 is a compressor for compressing and circulating the refrigerant, 2 is a cooler for evaporating the refrigerant, 3 is a fan for circulating the cool air cooled by the cooler 2, and 5 is a refrigerator for guiding a part of the cool air to the refrigerator compartment 4. A room air path 6 is a damper for opening and closing the air path 5 to control cool air to the refrigerator compartment 4.
Is a defrosting heater for defrosting the frost on the cooler 2, 9 is an F thermistor for detecting the temperature of the freezer compartment 8, 10 is an R thermistor for detecting the temperature of the refrigerator compartment 4, and 11 is a door detection for detecting opening and closing of the door. 12 is an outside air thermistor for detecting the ambient temperature of the refrigerator, and 13 is a cooler 2 for terminating defrosting.
A DEF thermistor 14 for detecting the temperature of the refrigerator is a control board for controlling the whole refrigerator. Here, the control board 14 includes a control means 15 and a control method determination 16.

Next, the contents of the control means 15 will be described with reference to FIG. In FIG. 2, the switch (1) 18 and the switch (2) 1 are used as means for turning on and off the power supply 17 of the electric component.
9, a switch (3) 20 for turning ON / O the compressor 1, the fan 3, the damper 6, and the defrost heater 7 respectively.
This is a contact point for FF. These contacts are driven by a coil (1) 21, a coil (2) 22, and a coil (3) 23, respectively, and these coils are energized by a driving circuit (1).
24, the drive circuit (2) 25, and the drive circuit (3) 26, and the microcomputer 27 determines which of them is energized.

In the case of defrosting, the coil (3) 23 is energized by the drive circuit (3) 26, the switch (3) 20 is turned on, and electricity is supplied from the power supply 17 to the defrosting heater 7 to perform defrosting (for this defrosting). The determination of the entry timing is performed by the control determining means 16). As an input of the microcomputer 27,
The thermistors 9, 10, 12 and 13 and the door detector 11. Here, 28 to 31 are voltage dividing resistors which divide the voltage between the thermistor and the voltage.

Next, the configuration of the control determining means 16 for starting defrosting will be described with reference to FIG. Compressor operating time integrating means 32
, The operating time of the compressor 1 is integrated, and the door detection means 33 detects that the door has been opened and inputs it. At the same time, the door opening / closing frequency per unit time is calculated from the door opening / closing number integrated per unit time by the door opening / closing frequency calculating means 34 per unit time, and held. On the other hand, the compressor operation integrated time calculated by the compressor operation time integration means 32 is calculated by the compressor operation integrated operation time determination means 35.
When the predetermined time has been reached, the unit opening / closing frequency for each unit time is compared by the unit time selection unit 36 for defrosting, and a priority is determined in large or small to determine a unit time block for defrosting. The timing for starting defrosting is selected by the defrosting operation control value determining means 37 based on a predetermined defrosting operation control rule, and the final defrosting control start is determined.

Next, referring to FIG. 4, the numerical ratio of the door opening / closing frequency and the updating will be described in detail with a flowchart. The door opening / closing number x _i is integrated for each unit time T (Hr) obtained by dividing 24 hours in step 38. Every 24 hours, for each of the door opening and closing number _{x i,} x _i = - a conversion _{(Si / m) + x i} , performs an average and the latest addition of one day of the last m days. In step 39, the door opening / closing frequency (S _i ) is updated to a new numerical value, with the initial values of S _i = S _i + x _i S _i being 0 i: 1 to n and n = 24 / T.

Referring to FIG. 5, a method of determining a unit time block in which defrosting is to be performed from the unit time range in which defrosting is to be performed as described above will be described in detail. In step 40, the magnitude of the door opening / closing frequency is compared in the entire unit time range, and the block with the lowest frequency is selected in step 41. Finally, the unit time block selected in step 42 is determined as the unit time for defrosting.

As described above, according to the first embodiment of the present invention, the change pattern of the number of times of opening and closing of the door in a day is always kept while refreshing from the accumulated data of the past several days, and the defrosting is performed based on the number of times of opening and closing of the door. In order to eliminate adverse effects on food. In order to know the use state of the refrigerator, a detection device for detecting opening and closing of the door is provided, and the number of opening and closing of the door is counted by the detection device.
On the other hand, a counter that counts 24 hours of the day in blocks of 2 hours is provided, and the number of times the door is opened and closed is counted for each block. (This is the data for one day.) The data for one day is accumulated for several days (for m days: actually for eight days), and for the newly counted one day. The data and the load average are calculated, and this is stored as a daily door opening / closing pattern (the number of times of opening / closing for each block of 2 hours). From the held door opening / closing pattern, it is determined which block has a small number of door opening / closing in a day, and when it comes to this block, defrosting is performed. The time required for defrosting is about 30
Minutes to 40 minutes. This allows defrosting to be performed at all times of the day when refrigerator use is low.

Embodiment 2 FIG. Next, a second embodiment of the present invention will be described with reference to FIGS. First, the configuration of the control determining means 16 that starts defrosting will be described with reference to FIG. The compressor operating time integrating means 32 integrates the operating time of the compressor 1, and the compressor operating time integrating means 43 for each unit time integrates the operating time of the compressor for each block obtained by dividing 24 hours into unit time, The door detection means 33 detects that the door has been opened and inputs the information. Further, the operating ratio for each unit time is calculated and held from the compressor operating time integrated for each unit time by the compressor operating ratio calculating means 44 for each unit time. Simultaneously means for calculating the door opening / closing frequency per unit time 34
Calculates and holds the door opening / closing frequency per unit time from the door opening / closing number integrated per unit time. On the other hand, when the compressor operation accumulated time accumulated by the compressor operation time accumulation means 32 reaches a predetermined time by the compressor operation accumulated operation time judgment means 35, it is predetermined by the time range estimating means 45 for defrosting. The unit time range of the integrated operating time of the compressor to be defrosted is estimated from the operating rate of the compressor per unit time obtained by the compressor operating rate calculating means 44 per unit time. In the unit time selection unit 36 for defrosting, the door opening / closing frequency for each unit time is compared in the estimated unit time range, and a priority order is determined by magnitude, and a unit time block for defrosting is determined.
The timing for starting defrosting is selected by the defrosting operation control value determining means 37 based on a predetermined defrosting operation control rule, and the final defrosting control start is determined.

Next, referring to FIG. 7, the numerical ratio of the door opening / closing frequency and the updating will be described in detail with reference to a flowchart. The door opening / closing number x _i is integrated for each unit time T (Hr) obtained by dividing 24 hours in step 38. Every 24 hours, for each of the door opening and closing number x _i, x _i = - a conversion _{(Si / m) + x i} , performs an average and the latest addition of one day of the last m days. In step 39, the door opening / closing frequency (S _i ) is updated to a new numerical value, with the initial values of S _i = S _i + x _i S _i being 0 i: 1 to n and n = 24 / T.

Next, the numerical ratio of the operating rate of the compressor and the updating will be described in detail with reference to a flowchart of FIG. 2 in step 46
The operating time t _i of the compressor is integrated for each unit time T (Hr) obtained by dividing four hours. Every 24 hours, for each operation time t _i , t _i = − (Ri / m) + t _i is converted, and the average of the past m days and the latest one day are added. Step 47 The operation rate R _i in the initial value of R _i = R _i + t _i R _i is 0 i: 1 to n, as n = 24 / T, and updates to the new number.

Next, referring to FIG. 9, the estimation of the unit time range in which defrosting is to be performed based on the operation rates quantified above will be described in detail using a flowchart. When the cumulative operation time S of the compressor reaches the predetermined time S ₁ in step 48, the operation rates quantified for each unit time are sequentially added from the current unit time in step 49, and are added in step 50. every time determines whether within a time range S ₂ to carry out the defrost. From the unit time that has reached the predetermined time in step 51,
A unit time beyond the time range in which defrosting is to be performed is selected as a unit time range in which defrosting is to be performed.

The method of determining a unit time block for defrosting from the unit time range in which defrosting is to be performed, which is estimated above, will be described in detail with reference to FIG. Step 40
The magnitude of the door opening / closing frequency is compared in the unit time range in which defrosting is to be performed, and the block with the lowest frequency is selected in step 41. Finally, the unit time block selected in step 42 is determined as the unit time for defrosting.

As described above, according to the second embodiment of the present invention, the change pattern of the number of times of opening and closing of the door during the day is maintained while constantly refreshing the accumulated data of the past several days, and the operation of the compressor is performed. The change of the rate is also held. When the cumulative operating time of the compressor reaches the specified time 1 (actually 8 hours), the specified time 2 (actually 16 hours) is reached based on the operating rate of the compressor previously held. The estimated timing is estimated, and the specified time 1
In the meantime, defrosting is performed at the place where the number of times of opening and closing of the door held earlier is the least, so that adverse effects on food are eliminated. The specified time 1 of the operating time of the compressor is a time when defrosting is necessary, and it is better to perform defrosting after this time, and the specified time 2 does not affect cooling performance and the like. Indicates the time during which defrosting must be performed in order to produce In order to know the use state of the refrigerator, a detection device for detecting the opening and closing of the door is provided, and the number of opening and closing of the door is counted by the detection device.
A counter is provided for counting the time in two-hour blocks, and the number of times the door is opened and closed is counted for each block. The operation time of the compressor is also counted for each block. (This is the data for one day.) The data for one day is accumulated for several days (for m days: actually for eight days), and for the newly counted one day. The data and the load average are averaged, and these are held as a daily door opening / closing pattern (two-hour block opening / closing) and a compressor operating rate pattern (two-hour block operating time). deep. When the accumulated time of the operation time reaches the specified time 1 (8 hours) (the block at this time is referred to as “block 1”) after the operation of the compressor, the operation rate of each block thereafter (operation Time), and the block when this total value reaches the specified time 2 (16 hours) is set as a block 2. From the block 1 or the block 2, the block open / close pattern of the held door is used. It is determined which of the two blocks has a smaller opening and closing of the door, and defrosting is performed when it comes to this block. Thereby, even when the operation rate is low, defrosting can be performed at an optimal defrost timing and when the use of the refrigerator is small.

Embodiment 3 FIG. Next, a third embodiment of the present invention will be described with reference to FIGS. First, the configuration of the control determining means 16 that starts defrosting will be described with reference to FIG. Compressor operation time accumulation means 3
2, the operation time of the compressor 1 is integrated, and the compressor operation time integration unit 43 integrates the operation time of the compressor for each block obtained by dividing 24 hours into unit time by the compressor operation time integration unit 43.
In step 3, it is detected that the door has been opened, and an input is made. Further, the operating ratio for each unit time is calculated and held from the compressor operating time integrated for each unit time by the compressor operating ratio calculating means 44 for each unit time. At the same time, the door opening / closing frequency per unit time is calculated from the door opening / closing number integrated per unit time by the door opening / closing frequency calculating means 34 per unit time, and held. On the other hand, when the compressor operation accumulated time accumulated by the compressor operation time accumulation means 32 reaches a predetermined time by the compressor operation accumulated operation time judgment means 35, it is predetermined by the time range estimating means 45 for defrosting. The unit time range of the integrated operating time of the compressor to be defrosted is estimated from the operating rate of the compressor per unit time obtained by the compressor operating rate calculating means 44 per unit time. In the unit time selection unit 36 for defrosting, the door opening / closing frequency for each unit time is compared in the estimated unit time range, and a priority order is determined by magnitude, and a unit time block for defrosting is determined. The timing for starting defrosting is selected by the defrosting operation control value determining means 37 based on a predetermined defrosting operation control rule, and the final defrosting control start is determined.

Next, referring to FIG. 12, the numerical ratio of the door opening / closing frequency and the update will be described in detail with reference to a flowchart. 24 in step 38
For each unit time T (Hr) obtained by dividing the time, the number of opening and closing doors x _i
Is multiplied. Every 24 hours, for each of the door opening and closing number x _i, x _i = - a conversion _{(Si / m) + x i} , performs an average and the latest addition of one day of the last m days. In step 39, the door opening / closing frequency (S _i ) is updated to a new numerical value, with the initial values of S _i = S _i + x _i S _i being 0 i: 1 to n and n = 24 / T.

Next, referring to FIG. 13, the numerical ratio of the operation rate of the compressor and the update will be described in detail with reference to a flowchart. In step 46, the operation time t _i of the compressor is integrated for each unit time T (Hr) obtained by dividing 24 hours. Every 24 hours, for each operation time t _i , t _i = − (Ri / m) + t _i is converted, and the average of the past m days and the latest one day are added. Step 47 The operation rate R _i in the initial value of R _i = R _i + t _i R _i is 0 i: 1 to n, as n = 24 / T, and updates to the new number.

Next, the estimation of the unit time range in which defrosting is to be performed from the operation rates quantified above will be described in detail with reference to the flowchart of FIG. When accumulated operation time S of the compressor, it reaches a predetermined time S ₁ in step 48,
Sequentially adding the digitized the operation ratio for each unit time from the current unit time in step 49, it is determined whether within a time range S ₂ to carry out the defrost time adding in step 50. In step 51, a unit time range from the unit time at which the predetermined time has been reached to the unit time exceeding the time range at which defrosting is to be performed is selected as the unit time range at which defrosting is to be performed.

Referring to FIG. 15, a method of determining a unit time block in which defrosting is to be performed from the unit time range in which defrosting is to be performed, which is estimated above, will be described in detail. Step 40
The magnitude of the door opening / closing frequency is compared in the unit time range in which defrosting is to be performed, and the block with the lowest frequency is selected in step 41. Next, in step 43, it is determined whether the block next to the selected block has the maximum door opening / closing frequency among all blocks. If the block has the maximum door opening / closing frequency, the block selected in step 44 is determined. Select the previous block. Finally, the unit time block selected in step 42 is determined as the unit time for defrosting.

As described above, according to the third embodiment of the present invention, the change pattern of the number of times of opening and closing of the door during the day is maintained while always refreshing from the accumulated data of the past several days, and the operation of the compressor is performed. The change of the rate is also held. When the cumulative operating time of the compressor reaches the specified time 1 (actually 8 hours), the specified time 2 (actually 16 hours) is reached based on the operating rate of the compressor previously held. The estimated timing is estimated, and the specified time 1
In the meantime, defrost at the place where the number of times the door has been opened and closed earlier is the least, and if the time immediately after that is the largest number of times the door is opened and closed, If so, the timing is avoided, and defrosting is performed at an earlier timing so as to eliminate adverse effects on food. In order to know the use state of the refrigerator, a detecting device for detecting the opening and closing of the door is provided, and the number of opening and closing of the door is counted by the detecting device. Meanwhile, 2 of the day
A counter is provided for counting four hours into two-hour blocks, and the number of times the door is opened and closed is counted for each block. The operation time of the compressor is also counted for each block. (This is the data for one day.) The data for one day is accumulated for several days (for m days: actually for eight days), and for the newly counted one day. The data and the load average are averaged, and these are held as a daily door opening / closing pattern (two-hour block opening / closing) and a compressor operating rate pattern (two-hour block operating time). deep. When the compressor is operated and the accumulated operation time reaches the specified time 1 (8 hours) (the block at this time is referred to as “block 1”).
The operation rate (operation time) of each subsequent block is totaled, and a block when this total value reaches a specified time 2 (16 hours) is set as a block 2. From the held door opening / closing pattern, it is determined which block has the least number of door opening / closing between the two blocks, and at the same time, the number of opening / closing of the block door next to the block having the least number of door opening / closing is determined. Check,
If the block is the block with the largest number of door opening / closing times in all the blocks, defrosting is performed when the block comes before the block with the smallest door opening / closing number. Thereby, even when the operation rate is low, defrosting can be performed at an optimal defrost timing and when the use of the refrigerator is small. In addition, when the refrigerator is frequently used, there is no adverse effect of heat due to defrosting.

Embodiment 4 FIG. Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG.
In step 40, the magnitude of the door opening / closing frequency is compared in the unit time range in which defrosting is to be performed, and the block with the lowest frequency is selected in step 41, and the block with the next lowest door opening / closing frequency is selected as the second candidate in step 45. select. Next, in step 43, it is determined whether the block next to the selected block has the maximum door opening / closing frequency among all the blocks.
In step 6, the second candidate block selected in step 45 is selected. Finally, the unit time block selected in step 42 is determined as the unit time for defrosting.

As described above, according to the fourth embodiment of the present invention, the change pattern of the number of times of opening and closing of the door during the day is maintained while always refreshing from the accumulated data of the past several days, and the operation of the compressor is operated. The change of the rate is also held. When the cumulative operating time of the compressor reaches the specified time 1 (actually 8 hours), the specified time 2 (actually 16 hours) is reached based on the operating rate of the compressor previously held. The estimated timing is estimated, and the specified time 1
In the meantime, defrost at the place where the number of doors opened and closed earlier is the smallest, and if the time immediately after that is the largest number of times the door is opened and closed, If this is the case, avoiding this timing, the defrosting is performed at the timing when the number of times the door is opened and closed is the second, so that the adverse effect on the food is eliminated. In order to know the use state of the refrigerator, a detection device for detecting opening and closing of the door is provided, and the number of opening and closing of the door is counted by the detection device. On the other hand, a counter that counts 24 hours of the day in blocks of 2 hours is provided, and the number of times the door is opened and closed is counted for each block. The operation time of the compressor is also counted for each block.
(This is the data for one day.) The data for one day is accumulated for several days (for m days: actually for eight days), and for the newly counted one day. The data and the load average are averaged, and these are held as a daily door opening / closing pattern (two-hour block opening / closing) and a compressor operating rate pattern (two-hour block operating time). deep. When the accumulated time of the operation time reaches the specified time 1 (8 hours) (the block at this time is referred to as “block 1”) after the operation of the compressor, the operation rate of each block thereafter (operation Block) when the total value reaches the specified time 2 (16 hours).
From the blocks 1 and 2, it is determined from which of the two blocks the number of open / closed doors is small. Check the number of times the door is opened and closed next to the block with the least number of doors, and if it is the block with the largest number of doors among all blocks, defrost when it comes to the block with the second smallest number of doors To do. Thereby, even when the operation rate is low, defrosting can be performed at an optimal defrost timing and when the use of the refrigerator is small. In addition, when the refrigerator is frequently used, there is no adverse effect of heat due to defrosting.

Embodiment 5 FIG. Hereinafter, a fifth embodiment of the present invention will be described. FIG.
FIG. 11 is an overall configuration diagram of a refrigerator according to a fifth embodiment of the present invention. A cooler 2 that circulates the refrigerant by a compressor 1 that compresses and circulates the refrigerant, evaporates the refrigerant, a fan 3 that circulates the cool air cooled by the cooler 2, and a freezing room thermistor 9 that detects the temperature of the freezing room 8 There is a control board 14 for controlling the whole refrigerator. Here, the control board 14 is composed of a control means 15 and a control method determining means 16, and the contents of the control means 15 will be described with reference to FIG.

In FIG. 18, a switch (1) 18 and a switch (2) 19 are used as means for turning on and off the power supply 17 of the electric parts.
This turns the compressor 1 and fan 3 ON / O, respectively.
This is a contact for FF, and this contact is a coil 21,
Driven by coils 22, energization of these coils
The current is supplied to the 19 drive circuits (1) 24 and the drive circuit (3) 26.

Further, there are a photocoupler 47 for controlling the number of revolutions of the fan 3, and condensers 48 and 49,
The photocoupler 47 is energized by the drive circuit (2) 25 of 20. Which of the drive circuit (1) 24, the drive circuit (2) 25, and the drive circuit (3) 26 is energized is determined. It is determined by the microcomputer 27. This decision
By the control method determining means 16. The inputs of the microcomputer 27 are the thermistor 9 and the door detector 11. Here, 29 is a voltage-dividing resistor that divides the voltage between the thermistor and the voltage.

Next, the contents of the control determining means 16 for controlling the rotational speed of the fan 3 will be described with reference to a control block diagram with reference to FIG. The door opening means is detected by the door input means 50, the door opening signal input by the door opening / closing frequency integrating means 51 is input, and the number of door openings per unit time is integrated. At 52, the new door opening number is always held, and the fan rotation number determining means 53 determines the predetermined rotation number of the fan 3 from the door opening / closing frequency.

Next, the contents of the control determining means 16 for controlling the number of revolutions of the fan 3 will be described with reference to a flowchart shown in FIG. In step 54, it is detected that the door has been opened, and an input is made. Next, in step 55, 24 hours are divided into unit times using the door open signal input in step 54 as an input, and the number of door openings per unit time is integrated. Step 56
Then, the number of door openings per unit time is calculated for a certain period, and the new number of door openings for a certain period is always held as data. Then, in step 57, the predetermined number of revolutions of the fan 3 is determined from the door opening / closing frequency per unit time.

Next, the numerical value ratio and the update of the door opening / closing frequency will be described in detail with reference to a flowchart in FIG. 24 in step 58
For each unit time T (Hr) obtained by dividing the time, the number of opening and closing doors x _i
Is multiplied. Every 24 hours, each for door opening and closing number x _i in step 58, x _i = - a conversion (Si / m) + x _i, performs an average and the latest addition of one day of the last m days. In step 59, the door opening / closing frequency S _i is updated to a new numerical value with the initial values of S _i = S _i + x _i S _i being 0 i: 1 to n and n = 24 / T. Therefore, in accordance with the priority order of the door opening / closing frequency obtained in step 59, when the priority order is high, the rotation speed of the fan is increased, and when it is low, the rotation speed is decreased.

Embodiment 6 FIG. Next, a sixth embodiment of the present invention will be described with reference to FIGS. A method of selecting the timing of defrosting from the door opening / closing frequency and the time range in which defrosting is to be performed will be described in detail with reference to FIG. In step 60, the magnitude of the door opening / closing frequency for each unit time is compared, and in step 61, ranking from "0" to "11" is performed. In step 62,
The time range in which defrosting is to be performed is combined with the ranked data. Here, it is not time to perform defrosting, that is, data is synthesized by forcibly setting the order of blocks that should not be defrosted to “12”. In step _{63, M 1 = F (I} 1, I 2, ··, I 1, ··, I 12) F (I 1, I 2, ··, I 1, ··, I 12) is I ₁ function ~I _12, I ₁ ~I ₁₂ is synthesized data, as will be computed using the optimum parameters for the door opening and closing frequency ranking predetermined for each unit time. Step 64
Where O ₁ = F (M ₁ , M ₂ ,..., M ₁ ,..., M ₁₂ ) G (M ₁ , M ₂ ,..., M ₁ ,..., M ₁₂ ) is M _{1 to} M _The data obtained in step 63 is calculated using predetermined optimal parameters as ₁₂ functions, and is used as data for each unit time. In step 65, a block for defrosting is selected from the results obtained by the above calculations.

The contents of the calculation will be described with reference to FIG. The operation is composed of hierarchized steps (intermediate layer and output layer). First, the operation of the intermediate layer is performed using the data I _{1 to} I ₁₂ ranked in step 62 as inputs. _{M 1 = 1 / (1 +} EXP (I 1 · W 2 (1, 1) + I 2 · W 2 (1, 2) + ··· + I 11 · W 2 (1, 11) + I 12 · W 2 (1, _{12))) M 2 = 1} / (1 + EXP (I 1 · W 2 (2, 1) + I 2 · W 2 (2, 2) + ··· + I 11 · W 2 (2, 11) + I 12 · W _{2 (2, 12)))} · · · M 11 = 1 / (1 + EXP (I 1 · W 2 (11, 1) + I 2 · W 2 (11, 2) + ··· + I M 12 = 1 / ( 1 + EXP (I ₁ · W _{2 (12 , 1)} + I ₂ · W _{2 (12 , 2)} + ... + I ₁₁ · W _{2 (12 , 11)} + I ₁₂ · W _{2 (12 , 12)} )) , calculation of the output layer, calculated as follows is performed the data in the intermediate layer as _{input. O 1 = M 1 · W} 1 (1, 1) + M 2 · W 1 (1, 2) + ··· _{+ M 11 · W 1 (1} , 11) + M 12 · W 1 (1, 12) O 2 = M 1 · W 1 (1, 1) + M 2 · W 1 (1, 2) + ··· + M 11 · _{W 1 (1, 11) +} M 12 · W 1 (1, 12) · · · O 11 _{M 1 · W 1 (11,} 1) + M 2 · W 1 (11, 2) + ··· + M 11 · W 1 (11, 11) + M 12 · W 1 (11, 12) O 12 = M 1 · W _{1 (12 , 1)} + M ₂ · W _{1 (12 , 2)} + ... + M ₁₁ · W _{1 (12 , 11)} + M ₁₂ · W _{1 (12 , 12)} Positive value in final output out blocks are selected as a block to perform defrosting. doing this determination in step 65. _{here, W 1 (1 ~ 12,} 1 ~ 12) and W _{2 (1} ~ _{12, 1
12} ) are the optimal parameters that relate the input and output, and these parameters are numerical values that are separately set in advance.
(Data preliminarily tuned to select the optimal block) In the example shown here, the model is a model in which the middle layer is one layer and 12 units are contained therein, but the middle layer is Any number of layers may be used, and the number of units therein may be any number.

Embodiment 7 FIG. Next, a seventh embodiment of the present invention will be described with reference to FIG. A method of selecting the timing for lowering the rotation of the fan from the door opening / closing frequency quantified using FIG. 24 will be described in detail. In step 71, the magnitude of the door opening / closing frequency for each unit time is compared, and in step 72, ranking (I ₁ ) from “0” to “11” is performed. In step _{73, M 1 = F (I} 1, I 2, ··, I 1, ··, I 12) F (I 1, I 2, ··, I 1, ··, I 12) is I ₁ as a function of ~I _12, it is calculated using the optimum parameters for the door opening and closing frequency ranking predetermined for each unit time. Further in step _{74, O 1 = F (M} 1, M 2, ··, M 1, ··, M 12) G (M 1, M 2, ··, M 1, ··, M 12) is M as a function of ₁ ~M _12, calculated using the optimum parameters obtained data predetermined with step 73, the data for each unit time. In step 75, a block for reducing the rotation of the fan is selected from the result obtained by the above calculation. The contents of the calculation are the same as in the sixth embodiment.

Embodiment 8 FIG. Next, an eighth embodiment of the present invention will be described with reference to FIGS. A method of determining a unit time block for performing supercooling of the freezing room will be described in detail with reference to FIG. In step 80, the magnitude of the door opening / closing frequency is compared, and the block with the highest frequency is selected in step 81. Finally step 8
In step 2, a block one block before the block selected in step 81 is determined as a unit time block for performing supercooling. As a method of supercooling, the OF of the compressor 1 and the fan 3 is selected in the block selected as shown in FIG.
By lowering the temperature at which F is performed than in the normal state, the temperature in the refrigerator is reduced, and the rise in food temperature is suppressed. Further, even if the compressor 1 and the fan 3 are operated for a certain period of time, the same supercooling operation can be performed.

[0043]

The present invention has the following effects.
The control device for a refrigerator according to claim 1, wherein the cool air generated by the cooler of the refrigerating cycle using the compressor is forcibly circulated by a fan, and in a refrigerator having a door, the compression time for integrating the operation time of the compressor is provided. Means for accumulating the operating time of the compressor, means for accumulating and updating the operating time of the compressor for at least the past seven days or more, and calculating the compressor operating rate for each predetermined unit time in one day; Means for calculating the opening / closing frequency of the compressor, means for calculating the door opening / closing frequency from the integrated door opening number, and defrosting the defrosting operation of the cooler predetermined from the compressor operating rate and the door opening / closing frequency. Within the time range to be selected, the time unit with the smallest number of door opening and closing times is selected, and the door opening and closing number of the next unit time of the time unit with the smallest number of door opening and closing times is the largest within the time range to perform the defrosting. if, door opening and closing times A smallest time unit of the next door opening and closing times less time unit selection means for entering the defrost to select a unit time based on a control rule to select a time unit, to execute the defrosting operation in the selected unit time Since the defrosting operation of the cooler is performed by selecting a timing at which the frequency of opening and closing the door is low, the temperature of the food in the refrigerator is not affected.

A refrigerator control device according to a second aspect of the present invention estimates a defrosting time range based on a compressor operation rate based on a predetermined control rule, and controls a control rule based on a compressor operation rate and a door opening / closing frequency. The defrosting operation of the cooler is performed based on the above, so that the food temperature in the refrigerator is not affected.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a refrigerator control device according to Embodiment 1 of the present invention.

FIG. 2 is a circuit diagram of a control device of the refrigerator according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a control device of the refrigerator according to the first embodiment of the present invention.

FIG. 4 is a flowchart of the control device of the refrigerator according to the first embodiment of the present invention.

FIG. 5 is a flowchart of the control device of the refrigerator according to the first embodiment of the present invention.

FIG. 6 is a block diagram of a control device of a refrigerator according to Embodiment 2 of the present invention.

FIG. 7 is a flowchart of the control device of the refrigerator according to the second embodiment of the present invention.

FIG. 8 is a flowchart of the control device of the refrigerator according to the second embodiment of the present invention.

FIG. 9 is a flowchart of the control device of the refrigerator according to the second embodiment of the present invention.

FIG. 10 is a flowchart of the control device of the refrigerator according to the second embodiment of the present invention.

FIG. 11 is a block diagram of a control device for a refrigerator according to Embodiment 3 of the present invention.

FIG. 12 is a flowchart of a control device for a refrigerator according to Embodiment 3 of the present invention.

FIG. 13 is a flowchart of a control device for a refrigerator according to Embodiment 3 of the present invention.

FIG. 14 is a flowchart of a control device of a refrigerator according to Embodiment 3 of the present invention.

FIG. 15 is a flowchart of a control device for a refrigerator according to Embodiment 3 of the present invention.

FIG. 16 is a flowchart of a control device for a refrigerator according to Embodiment 4 of the present invention.

FIG. 17 is an overall configuration diagram of a refrigerator control device according to Embodiment 5 of the present invention.

FIG. 18 is a circuit diagram of a control device for a refrigerator according to Embodiment 5 of the present invention.

FIG. 19 is a block diagram of a control device of a refrigerator according to Embodiment 5 of the present invention.

FIG. 20 is a flowchart of a control device for a refrigerator according to Embodiment 5 of the present invention.

FIG. 21 is a flowchart of a control device for a refrigerator according to Embodiment 5 of the present invention.

FIG. 22 is a flowchart of a control device for a refrigerator according to Embodiment 6 of the present invention.

FIG. 23 is a diagram illustrating a calculation method of a specified calculation of the control device of the refrigerator according to the sixth embodiment of the present invention.

FIG. 24 is a flowchart of the control device of the refrigerator according to the seventh embodiment of the present invention.

FIG. 25 is a flowchart of the control device of the refrigerator according to the eighth embodiment of the present invention.

FIG. 26 is a time chart for illustrating overcooling of the control device of the refrigerator according to the eighth embodiment of the present invention.

FIG. 27 is an overall configuration diagram of a conventional refrigerator control device.

[Explanation of symbols]

Reference Signs List 1 compressor, 2 cooler, 3 fan, 15 control means, 16 control method determination means, 49 compressor operation time integration means, 53 compressor operation rate calculation means, 54 door open / close frequency calculation means, 55 defrost Means for estimating the time range to be devised, 56 Means for selecting unit time to enter defrost, 57
Means for determining the control value of the defrosting operation, 79 Fan rotation speed determining means.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasuhiko Sugimoto 3-18-1, Oka, Shizuoka-shi Mitsubishi Electric Mechatronics Software Co., Ltd. Shizuoka branch office (56) References JP-A-63-254379 (JP, A) JP-A-61-140770 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 21/06

Claims (2)

(57) [Claims] 1. A compressor operating time integrating means for forcibly circulating a cool air generated by a cooler of a refrigeration cycle using a compressor with a fan, and integrating an operating time of the compressor in a refrigerator having a door. Means for accumulating and updating the operating time of the compressor over at least the past seven days, calculating a compressor operating rate for each predetermined unit time in one day, and integrating the number of open doors Means for calculating a door opening / closing frequency from the accumulated number of door openings, and a time period in which the defrosting operation of the defrosting operation of the cooler is predetermined from the compressor operating rate and the door opening / closing frequency. , Door opening and closing
If the time unit with the smallest number of times is selected, and the number of times the door is opened and closed in the next unit time of the time unit with the smallest number of times of opening and closing the door is the largest within the time range in which the defrosting is to be performed, the door is opened and closed.
A unit time selecting means for defrosting to select a unit time based on a control rule for selecting a time unit having the smallest number of times of opening and closing the door next to the time unit having the least number of times, and executing the defrosting operation in the selected unit time And a control device for the refrigerator. 2. A means for forcibly circulating cool air generated by a cooler of a refrigeration cycle using a compressor with a fan, and for accumulating the operation time of the compressor in a refrigerator having a door, Means for calculating a compressor operating rate for each predetermined unit time from the operating time, and means for estimating a time range in which defrosting is to be performed from the compressor operating rate when the compressor operating time reaches a predetermined value. Means for integrating the number of opening of the door, means for calculating the frequency of opening and closing the door per unit time from the integrated number of opening the door, and frequency of opening and closing the door from among the unit times included in the estimated time range. A controller for a refrigerator, comprising: means for selecting a unit time to enter a defrosting operation based on the above, and means for executing the defrosting operation in the selected unit time.